code: def _TagSize(field_number):
      """Returns the number of bytes required to serialize a tag with this field
      number."""
      # Just pass in type 0, since the type won't affect the tag+type size.
      return _VarintSize(wire_format.PackTag(field_number, 0))
  
imports: import struct
  import six
  from google.protobuf.internal import wire_format
label_desc: Use image node_id 3 for calling a global function with example usage: _TagSize(field_number) and returns: _VarintSize